Snap-off utility knife



FIG. 1 is a top perspective view of an embodiment of the claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a bottom perspective view thereof.

The broken lines depict portions of the snap-off utility knife in which the design is embodied that are not considered part of the claimed design. 

CLAIM We claim the ornamental design for a snap-off utility knife, as shown and described. 